EP2166206A1 - Dispositif de dosage destiné au dosage d'un moyen de réduction, notamment pour une réduction catalytique sélective, dans un flux de gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif de dosage destiné au dosage d'un moyen de réduction, notamment pour une réduction catalytique sélective, dans un flux de gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP2166206A1
EP2166206A1 EP09009535A EP09009535A EP2166206A1 EP 2166206 A1 EP2166206 A1 EP 2166206A1 EP 09009535 A EP09009535 A EP 09009535A EP 09009535 A EP09009535 A EP 09009535A EP 2166206 A1 EP2166206 A1 EP 2166206A1
Authority
EP
European Patent Office
Prior art keywords
dosing device
catalytically active
metering
active surface
reducing agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09009535A
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German (de)
English (en)
Other versions
EP2166206B1 (fr
Inventor
Andreas Döring
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP2166206A1 publication Critical patent/EP2166206A1/fr
Application granted granted Critical
Publication of EP2166206B1 publication Critical patent/EP2166206B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/40—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a hydrolysis catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/06—Adding substances to exhaust gases the substance being in the gaseous form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1426—Filtration means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a metering device for adding a reducing agent, in particular for a selective catalytic reduction, in an exhaust gas stream of an internal combustion engine, according to the preamble of claim 1.
  • Catalytic purification processes to remove pollutants from an exhaust of an incinerator. Catalytic purification processes in which a pollutant reacts as the first reactant with an additional medium introduced into the exhaust gas as the second reactant are used in what are known as reducing agent-operated emission control systems.
  • the medium to be introduced into the exhaust gas space is usually a reducing agent which reduces one or more pollutants of the exhaust gas.
  • a reducing agent which reduces one or more pollutants of the exhaust gas.
  • SCR selective catalytic reduction
  • a substance having a direct reducing action such as, for example, ammonia, or a precursor, which liberates substances reducing in the exhaust gas, is fed to the exhaust gas stream.
  • urea usually in the form of a urea-water solution, ammonium formate or the like may be used as a precursor. be used.
  • hydrolysis or urea decomposition catalysts (EP0487886B1 and EP0555746B1 ), in which the decomposition temperatures can be lowered to about 170 ° C. They accelerate the hydrolysis of isocyanic acid released by thermolysis during urea decomposition to NH 3 and CO 2 .
  • active components TiO 2 and / or SiO 2 and / or Al 2 O 3 and / or zeolites are used. These active components are applied in the form of a coating to a ceramic or metallic, usually honeycomb, catalyst support.
  • the ammonia (NH 3 ) formed in the selective catalytic reduction is capable of reducing nitrogen monoxide (NO) and nitrogen dioxide (NO 2 ) to molecular nitrogen (N 2 ).
  • the selective catalytic reduction usually takes place on a so-called SCR catalyst.
  • the catalysts are heated as quickly as possible to their operating temperature, in particular the so-called light-off temperature at which 50% of the pollutants can be reacted.
  • the catalysts are arranged as close to the engine as possible in the exhaust system of an internal combustion engine, which favors the rapid heating and thus the fastest possible starting of the catalyst. Accordingly, the dosing device projecting into the exhaust gas stream is flowed around by a very hot exhaust gas flow, which leads to a strong rise in temperature within the supply device.
  • reducing agents which can form solid by-products during their decomposition, such as.
  • a metering device in which a cooling of the injector is to be achieved in that the reducing agent, in particular fuel, is diverted from a cooler return.
  • a channel wall of the metering channel and / or at least one intermediate element arranged in the metering channel to have a catalytically active surface at least in partial regions.
  • the catalytically active surface is preferably formed by such a catalytically active material, which, in particular in conjunction with dissolved solids as a reducing agent or reducing agent component, for.
  • a partial stream branched off from an exhaust gas stream could, in principle, also be conducted in the metering channel which, together with a reducing agent introduced in this partial stream, is then returned to the main exhaust stream.
  • at least portions of the metering device which are not in contact with the exhaust gas may also be formed or provided with a catalytically active surface.
  • At least one filter element is provided as an intermediate element upstream of the at least one outlet opening of the metering channel and has a predetermined distance from the at least one outlet opening of the metering channel.
  • this intermediate element which is preferably designed as a filter element, may be the element forming the catalytically active surface in the region of the metering channel.
  • a metering channel wall can then also have a catalytically active surface.
  • active components here are the elements of platinum metal group and / or cerium and / or vanadium and / or tungsten and / or titanium and / or silicon and / or aluminum and / or their oxides and / or zeolites.
  • the metering device is preferably formed by a metering tube, which protrudes in the assembled state at least with a partial region in the exhaust gas flow, wherein in conjunction with a metering tube whose inner tube wall then forms the channel wall and thus the Zudosierkanal.
  • a metering tube which protrudes in the assembled state at least with a partial region in the exhaust gas flow, wherein in conjunction with a metering tube whose inner tube wall then forms the channel wall and thus the Zudosierkanal.
  • the metering channel is designed and constructed as a nozzle in order to be able to nozzle the reducing agent in a finely divided manner into the exhaust gas stream.
  • a catalytically active surface is also provided or formed in outer wall regions of the metering device, which is preferably designed as metering tube, in particular in those outer wall regions. which protrude into the exhaust stream in the mounted state of the metering device.
  • the catalytically active surface is in this case z. B. analogous to the inside configuration again for given substances, in particular for given Reduktionsffenzeretzungs consist, selectively.
  • the metering device in the outdoor area z. B. prevent the deposition of solids on this itself or make a contribution to decompose existing in the exhaust stream solids and thus reduce their share, which thus adding z. As hydrolysis and the deposition of such solids in the exhaust system reliably helps to avoid.
  • the active components or the catalytically active surface can be applied in the form of a coating. In the simplest case, this can be done using a washcoat. However, since the adhesion between such a coated coating and the material of the metering device is low, it can lead to the spalling of the coating and as a result to clogging of the metering device. This is particularly problematic for nozzles with fine nozzle holes. In this case, to improve the adhesion, the active layer may also be prepared by platinizing, anodising, impregnating and / or steaming.
  • the metering device partially or completely of a catalytically active material, which may possibly be dispensed with a coating.
  • a catalytically active material which may possibly be dispensed with a coating.
  • alloys, including different active components with z.
  • aluminum titanate or titanium-containing steels as well conceivable as pure substances, eg. For example titanium.
  • the metering device according to the invention is preferably used in an exhaust system in which downstream of the metering device, an SCR catalyst and optionally a hydrolysis catalyst and / or a particulate filter is attached.
  • Fig. 1 is shown schematically and by way of example a cross section through a free end of a metering device designed as a nozzle 1.
  • This nozzle 1 has a Zudosierkanal 2, through which the aqueous urea solution shown here only schematically as a reducing agent 3 via the nozzle end side nozzle openings 4, 5 as outlet openings in an exhaust line 6 (FIGS. Fig. 2 ) can be added at predetermined times in predetermined amounts.
  • a Zudosierkanal 2 through which the aqueous urea solution shown here only schematically as a reducing agent 3 via the nozzle end side nozzle openings 4, 5 as outlet openings in an exhaust line 6 (FIGS. Fig. 2 ) can be added at predetermined times in predetermined amounts.
  • the nozzle 1 projects upstream of an SCR catalyst 7 in the exhaust line 6, so that takes place in the region between the nozzle 1 and the SCR catalyst 7, a mixing of the exhaust stream 8 with the reducing agent and a laden with reducing agent exhaust stream 8 'flows into the SCR catalyst 7.
  • the nozzle 1 itself is constructed as follows:
  • a channel wall 9 of Zudosierkanals 2 is coated with a catalytically active surface layer 10 of a catalytically active material, by means of the reducing agent decomposition products 11, as they are only extremely schematically and by way of example in the Fig. 1 are represented, bound and can be further decomposed. This reduces the risk that these reducing agent decomposition products 11, which due to the high temperatures in the Zudosierkanals 2 z. B. can be formed from the reducing agent 3, the nozzle openings 4, 5 can clog.
  • the catalytically active surface layer 10 is formed by such a catalytically active material which increases the selectivity to form non-annular and / or non-solid reductant decomposition products compared to annular and / or solid reductant decomposition products and / or decomposition of the ring and / or solid reductant decomposition products ,
  • a filter element 12 may also be arranged in the metering channel 2 at a predetermined distance from the nozzle openings 4, 5, which is shown here only schematically and in dashed lines.
  • This filter element 12 can in turn be coated with a catalytically active surface layer 13 of preferably the same material as the catalytically active surface layer 10.
  • a possibly provided filter element 12 also causes a higher residence time of the reducing agent decomposition products 11 in the region of the catalytically active surface layer 13, which also favors the decomposition process.
  • a catalytically active surface layer 15 of a defined catalytically active material also be provided in the region of the nozzle outer wall 14, a catalytically active surface layer 15 of a defined catalytically active material, at least in that nozzle region which protrudes into the exhaust line 6.
  • This can z.
  • SCR catalyst 7 is reliably prevented by the popping off of solid reductant decomposition products from the nozzle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Toxicology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)
EP09009535A 2008-09-23 2009-07-23 Dispositif de dosage destiné au dosage d'un moyen de réduction, notamment pour une réduction catalytique sélective, dans un flux de gaz d'échappement d'un moteur à combustion interne Active EP2166206B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008048426A DE102008048426A1 (de) 2008-09-23 2008-09-23 Dosiervorrichtung zur Zudosierung eines Reduktionsmittels, insbesondere für eine selektive katalytische Reduktion, in einen Abgasstrom einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2166206A1 true EP2166206A1 (fr) 2010-03-24
EP2166206B1 EP2166206B1 (fr) 2013-01-23

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EP09009535A Active EP2166206B1 (fr) 2008-09-23 2009-07-23 Dispositif de dosage destiné au dosage d'un moyen de réduction, notamment pour une réduction catalytique sélective, dans un flux de gaz d'échappement d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP2166206B1 (fr)
CN (1) CN101684742B (fr)
DE (1) DE102008048426A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020765A1 (fr) * 2014-05-06 2015-11-13 Peugeot Citroen Automobiles Sa Injecteur de reducteur d'oxydes d'azote a decomposition amelioree du reducteur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104047684A (zh) * 2014-06-30 2014-09-17 凯龙高科技股份有限公司 一种用于尿素溶液罐的加液装置
DE102019006499A1 (de) * 2019-09-16 2021-03-18 Albonair Gmbh Beheizte Einpritzdüse

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487886B1 (fr) 1990-11-29 1994-04-13 MAN Nutzfahrzeuge Aktiengesellschaft Procédé et installation pour la réduction catalytique sélective de NOx des gaz d'échappement contenant de l'oxygène
EP0558452B1 (fr) 1992-02-24 1995-05-03 Hans Thomas Hug Purification des effluents gazeux de combustion
WO1996036797A1 (fr) 1995-05-19 1996-11-21 Siemens Aktiengesellschaft Chambre de premelange pour installation d'epuration de gaz d'echappement
EP0555746B1 (fr) 1992-02-10 1997-09-10 MAN Nutzfahrzeuge Aktiengesellschaft Dispositif pour la réduction catalytique de NOx
DE10348800A1 (de) * 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Diesel-Abgasnachbehandlungssysteme
WO2004079171A1 (fr) * 2003-03-01 2004-09-16 Imi Vision Limited Ameliorations apportees a des emissions de moteur
DE10324482A1 (de) 2003-05-30 2004-12-16 Robert Bosch Gmbh Vorrichtung zur Dosierung eines Reduktionsmittels zum Abgas eines Verbrennungsmotors
DE10342003A1 (de) * 2003-09-05 2005-03-31 Robert Bosch Gmbh Vorrichtung zur Aufbereitung einer Reduktionsmittel-Vorprodukt-Lösung zur Abgasnachbehandlung
EP1676986A1 (fr) * 2003-09-30 2006-07-05 Nissan Diesel Motor Co., Ltd. Dispositif et procede de purification des gaz d'echappement pour un moteur
DE29924992U1 (de) 1998-02-16 2007-11-15 Argillon Gmbh Dosiersystem
DE102006023145A1 (de) * 2006-05-16 2007-11-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren und Vorrichtung zur Aufbereitung des Abgases einer Verbrennungskraftmaschine
WO2009068136A1 (fr) * 2007-11-30 2009-06-04 Bayerische Motoren Werke Aktiengellschaft Dispositif pour ajouter un agent de réduction à un flux de gaz d'échappement dans un moteur à combustion interne
DE102008012972A1 (de) * 2008-03-06 2009-09-10 Emitec Gesellschaft Für Emissionstechnologie Mbh Verdampfungseinheit zur Erzeugung eines mindestens einen Reduktionsmittelvorläufer und/oder ein Reduktionsmittel umfassenden Gases
WO2009109423A1 (fr) * 2008-02-29 2009-09-11 Emitec Gesellschaft Für Emissionstechnologie Mbh Unité d'évaporation pour la production d'ammoniac gazeux

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487886B1 (fr) 1990-11-29 1994-04-13 MAN Nutzfahrzeuge Aktiengesellschaft Procédé et installation pour la réduction catalytique sélective de NOx des gaz d'échappement contenant de l'oxygène
EP0555746B1 (fr) 1992-02-10 1997-09-10 MAN Nutzfahrzeuge Aktiengesellschaft Dispositif pour la réduction catalytique de NOx
EP0558452B1 (fr) 1992-02-24 1995-05-03 Hans Thomas Hug Purification des effluents gazeux de combustion
WO1996036797A1 (fr) 1995-05-19 1996-11-21 Siemens Aktiengesellschaft Chambre de premelange pour installation d'epuration de gaz d'echappement
DE29924992U1 (de) 1998-02-16 2007-11-15 Argillon Gmbh Dosiersystem
DE10348800A1 (de) * 2002-11-21 2004-06-17 Ford Global Technologies, LLC, Dearborn Diesel-Abgasnachbehandlungssysteme
WO2004079171A1 (fr) * 2003-03-01 2004-09-16 Imi Vision Limited Ameliorations apportees a des emissions de moteur
DE10324482A1 (de) 2003-05-30 2004-12-16 Robert Bosch Gmbh Vorrichtung zur Dosierung eines Reduktionsmittels zum Abgas eines Verbrennungsmotors
DE10342003A1 (de) * 2003-09-05 2005-03-31 Robert Bosch Gmbh Vorrichtung zur Aufbereitung einer Reduktionsmittel-Vorprodukt-Lösung zur Abgasnachbehandlung
EP1676986A1 (fr) * 2003-09-30 2006-07-05 Nissan Diesel Motor Co., Ltd. Dispositif et procede de purification des gaz d'echappement pour un moteur
DE102006023145A1 (de) * 2006-05-16 2007-11-22 Emitec Gesellschaft Für Emissionstechnologie Mbh Verfahren und Vorrichtung zur Aufbereitung des Abgases einer Verbrennungskraftmaschine
WO2009068136A1 (fr) * 2007-11-30 2009-06-04 Bayerische Motoren Werke Aktiengellschaft Dispositif pour ajouter un agent de réduction à un flux de gaz d'échappement dans un moteur à combustion interne
WO2009109423A1 (fr) * 2008-02-29 2009-09-11 Emitec Gesellschaft Für Emissionstechnologie Mbh Unité d'évaporation pour la production d'ammoniac gazeux
DE102008012972A1 (de) * 2008-03-06 2009-09-10 Emitec Gesellschaft Für Emissionstechnologie Mbh Verdampfungseinheit zur Erzeugung eines mindestens einen Reduktionsmittelvorläufer und/oder ein Reduktionsmittel umfassenden Gases

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020765A1 (fr) * 2014-05-06 2015-11-13 Peugeot Citroen Automobiles Sa Injecteur de reducteur d'oxydes d'azote a decomposition amelioree du reducteur

Also Published As

Publication number Publication date
CN101684742A (zh) 2010-03-31
DE102008048426A1 (de) 2010-04-01
CN101684742B (zh) 2015-12-09
EP2166206B1 (fr) 2013-01-23

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